Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

tests/Import/ImportCompilerPassTest.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Tests\Import;
+
+use App\Import\ImportChain;
+use App\Import\ImportCompilerPass;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class ImportCompilerPassTest extends TestCase
+{
+    public function testProcessNoDefinition()
+    {
+        $container = new ContainerBuilder();
+        $res = $this->process($container);
+
+        $this->assertNull($res);
+    }
+
+    public function testProcess()
+    {
+        $container = new ContainerBuilder();
+        $container
+            ->register(ImportChain::class)
+            ->setPublic(false)
+        ;
+
+        $container
+            ->register('foo')
+            ->addTag('wallabag_import.import', ['alias' => 'pocket'])
+        ;
+
+        $this->process($container);
+
+        $this->assertTrue($container->hasDefinition(ImportChain::class));
+
+        $definition = $container->getDefinition(ImportChain::class);
+        $this->assertTrue($definition->hasMethodCall('addImport'));
+
+        $calls = $definition->getMethodCalls();
+        $this->assertSame('pocket', $calls[0][1][1]);
+    }
+
+    protected function process(ContainerBuilder $container)
+    {
+        $repeatedPass = new ImportCompilerPass();
+        $repeatedPass->process($container);
+    }
+}